My 360 Saga

USCG CHARGER said

Whats the ideal CR for these enigines running on pump gas? So if I do order a rebuild kit w/pistons I'll know the info. If I do a pisont repacement do i need to have in rebalanced for stock size pistons but a different top?

The cam is a SIg Erson High Flow 1H or IH I cant tell....

Would it be easier to get my Compression from the piston or be milling the heads?


Jason

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You'd have to mill the heads a ton to get it even in the 9's. Piston replacement is the best way to go. Mid 9's is a good compression for the street. High 9's works if your running a bigger cam that bleeds off some cyl. pressure. My 360 is 9.9 to 1 and it works fine on 93 octane because I have a fairly large cam in it. That being said you really need to keep it to 10-1 max.

The post with the link to Mancini's kit with pistons shows them to be Sterling pistons. I could be wrong but I think Sterling only makes stock type pistons. Not like the KB's or Sealed power ones that have a higher comp. distance.

With the KB's you would definetly have to have it balanced because they're alot lighter than stock pistons. The Sealed power units are pretty close to stock weight so you could get away without balancing but if you can afford it balancing is allways a good idea since they were'nt balanced great from the factory.